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题库 / Prep2007E1-SC-140
In human hearing, subtle differences in how the two ears hear a given sound help the listener determine the qualities of that sound.
in how the two ears hear a given sound help the listener determine
in the two ears hearing a given sound help the listener in determining
in how a sound is heard by the two ears helps the listener determine
between how the two ears hear a given sound helps the listener in determining
between how a sound is heard by the two ears help the listener in determining
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主语differences，排除CD，between and，排除E。
difference in two ears 不恰当，排除B
A correct
B: differences in the two ears，原句其实在比较两只耳朵听到的sound的差别， a difference in ……
Idiom: help do sth. / help to do sth. / help sb. do sth. / help sb. to do sth. / help in doing sth.
"between and 搭配 排除DE
主语是复数，动词也要用复数 排除C
AB区分：
A，differences in how the two ears hear a given sound，how引导名词性从句，句子核心是：“两只耳朵如何听一个声音的差异”
B，differences in the two ears hearing a given sound，句子核心是：“两个耳朵的差异”，“听一个声音”作ears的定语，置于differences从句的第二层，没有A的表达效果好。"
(A) 正确，difference in sth，help sb do sth。
(B) in the two ears hearing … 去掉how改变原文要表达的含义;help in doing用法错误。
(C) 被动语态的表达没有必要;helps应该是help，因为其主语是复数differences。
(D) between应该是用于表达“二者之间”的含义，用于此处不正确;helps应该是help。
(E) between应该是用于表达“二者之间”的含义，用于此处不正确;被动语态的表达没有必要。
between …and排除DE
AB区分：
A，differences in how the two ears hear a given sound，how引导名词性从句，句子核心是：“两只耳朵如何听一个声音的差异”
B，differences in the two ears hearing a given sound，句子核心是：“两个耳朵的差异”，“听一个声音”作ears的定语，置于differences从句的第二层，没有A的表达效果好。
A/C：
A，differences in how the two ears hear a given sound，how引导名词性从句，句子核心是：“两只耳朵如何听一个声音的差异”
C，differences in the two ears hearing a given sound，句子核心是：“两个耳朵的差异”，“听一个声音”作ears的定语，置于differences从句的第二层，没有A的表达效果好。
between and 排除DE
differences谓语动词用复数 排除C
help sb do sth 排除B
help to do/do sth; help with sth; help in (doing) sth,都表示帮助某人做某事
in/between：
difference in one thing；difference between A and B
help sb in doing sth,帮助某人作某事
So use "in" with a single object, and "between" with a pair of objects.
"Difference in" is usually used to refer to a change in one thing, instead of noting the dissimilarity between two things.
"In" is also used when you are referring to the difference between two things by pointing out the difference itself (i.e. the ONE thing that's different).
The in vs. between issue is an idiom. I say differences in X (just one thing) or differences between X and Y (two things). This sentence has one thing: how the two ears hear a given sound. So, I need "differences in." Elim D and E.
【求教】这里为什么不能用differences between呢？不是两个耳朵听到的差别么？似乎是两者之间的差别呀？烦请老师解答~谢谢！
difference in 表示“在...方面的差异”，而difference between 表示“……与……之间的差异”，一般还与and连用，即difference between...and...
句意是想说，在人类的听觉中，两个耳朵在听某种特定声音上的细小差别帮助他们来决定声音质量。
D用了helps，而主语是subtle differences，这个马上杀了。
E用了被动，意思是两个声音被耳朵听见，与A是两个耳朵如何听到声音，感觉A更加顺更加舒服点。
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